/* 确定好要划分的份数 */
@pieces: 15;

/* 设置html初始字号 */
html {
  font-size: 50px;
}

/* 320px */
@media screen and (max-width: 359px) {
  html {
    font-size: 320px / @pieces;
  }
}
/* 360 */
@media screen and (min-width: 360px) {
  html {
    font-size: 360px / @pieces;
  }
}
/* 375px */
@media screen and (min-width: 375px) {
  html {
    font-size: 375px / @pieces;
  }
}
/* 384px */
@media screen and (min-width: 384px) {
  html {
    font-size: 384px / @pieces;
  }
}
/* 400px */
@media screen and (min-width: 400px) {
  html {
    font-size: 400px / @pieces;
  }
}
/* 414px */
@media screen and (min-width: 414px) {
  html {
    font-size: 414px / @pieces;
  }
}
/* 480px */
@media screen and (min-width: 480px) {
  html {
    font-size: 480px / @pieces;
  }
}
/* 540px */
@media screen and (min-width: 540px) {
  html {
    font-size: 540px / @pieces;
  }
}
/* 720px */
@media screen and (min-width: 720px) {
  html {
    font-size: 720px / @pieces;
  }
}
/* 750px */
@media screen and (min-width: 750px) {
  html {
    font-size: 750px / @pieces;
  }
}